ふどうしん 不動心 LinksSentence search for 不動心Sentence search for ふどうしんKanji details for 不, 動 and 心Edit in JMdict Noun1. imperturbability; steadfastnessNoun2. cool head in an emergency; keeping one's calm (e.g. during a fight)Martial arts Discussions Log in to talk about this word.